CVE-2025-20638

Physical information disclosure via uninitialized DA heap read

Published Feb 3, 2025 · Updated Feb 3, 2025

Information disclosure in MediaTek Flash Tool V5 DA on Android 12.0 through 15.0 allows physically proximate attackers to read heap data. The DA reads heap memory before its contents are initialized, exposing indeterminate data held in that allocation. Exploitation requires physical access to an affected device and user interaction, but no additional execution privileges.

CVSS severity4.3
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in MediaTek Flash Tool V5 DA on Android 12.0 through 15.0 allows physically proximate attackers to read heap data. The DA reads heap memory before its contents are initialized, exposing indeterminate data held in that allocation. Exploitation requires physical access to an affected device and user interaction, but no additional execution privileges.

The record

CVE
CVE-2025-20638
Published
Feb 3, 2025
Updated
Feb 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-457
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.6CISA-ADPCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-457Use of Uninitialized Variable

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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